Watch List notes:

UNITED STATES: Countermarks, 1746, KM-579.2 (Great Britain), Spink-3719, "N.PrattJ" countermark on 1746 British halfpenny host, attribution tentative, VF on VG host. This countermark may be from Nathan Pratt, Jr. of Essex, Connecticut (cf. Brunk-P-690), however it does not match the lettering style of other Pratt countermarks. Presumably, the r of Jr in the countermark didn't strike up.

Estimate: 100-150 USD